Collidine

242.35900

121.089149355 g/mol

203-613-3

7IE4BK5J5V

460

1993

DTXSID1051561

Colorless liquid

25.78000

4.01360

0.939 g/cm³ @ Temp: 25 °C

-46.0 °C|-44.5 °C

165-168 °C

42.8ºC

Index of refraction: 1.4959 @ 25 °C/D

0.29 M|Sol in methanol, ethanol, chloroform, benzene, toluene, and dil acids; miscible with ether|Sol in acetone|Sol in water (in g/100 ml water): 20.8 g @ 6 °C, 3.5 g @ 20 °C, 1.8 g @ 100 °C

1.99 mmHg|1.99 mm Hg @ 25 °C

Aromatic odor

pKa = 7.43 (conjugate acid)

Density: 0.920-0.935 at 15.5 °C/15.5 °C, aprox 7.74 lb/gal; index of refraction: 1.49770 @ 22.1 °C/D /Commercial grade/|Dielectric constant at 22 °C: 6.6 (wavelength 70 cm)

Flammable. Insoluble in water.

Amines, Phosphines, and Pyridines

COLLIDINE neutralizes acids in exothermic reactions to form salts plus water. These acid-base reactions are exothermic. Incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. May generate flammable gaseous hydrogen in combination with strong reducing agents such as hydrides.

III

3.2

UN 1992

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. Those substances designated with a (P) may polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water. Substance may be transported hot. For hybrid vehicles, ERG Guide 147 (lithium ion batteries) or ERG Guide 138 (sodium batteries) should also be consulted. If molten aluminum is involved, refer to ERG Guide 169. (ERG, 2016)

|Danger|H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]|P210, P233, P240, P241, P242, P243, P261, P264, P270, P271, P280, P301+P312, P302+P352, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P312, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P370+P378, P403+P233, P403+P235, P405, and P501|Aggregated GHS information provided by 203 companies from 11 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H226: Flammable liquid and vapor [Warning Flammable liquids]|P210, P233, P240, P241, P242, P243, P260, P264, P270, P280, P301+P312, P302+P352, P303+P361+P353, P312, P314, P322, P330, P361, P363, P370+P378, P403+P235, P405, and P501

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: CAUTION: All these products have a very low flash point: Use of water spray when fighting fire may be inefficient. CAUTION: For mixtures containing alcohol or polar solvent, alcohol-resistant foam may be more effective. SMALL FIRE: Dry chemical, CO2, water spray or regular foam. LARGE FIRE: Water spray, fog or regular foam. Do not use straight streams. Move containers from fire area if you can do it without risk. FIRE INVOLVING TANKS OR CAR/TRAILER LOADS: Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn. (ERG, 2016)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: As an immediate precautionary measure, isolate spill or leak area for at least 50 meters (150 feet) in all directions. LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet). FIRE: If tank, rail car or tank truck is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directions; also, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2016)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). All equipment used when handling the product must be grounded. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Prevent entry into waterways, sewers, basements or confined areas. A vapor-suppressing foam may be used to reduce vapors. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. Use clean, non-sparking tools to collect absorbed material. LARGE SPILL: Dike far ahead of liquid spill for later disposal. Water spray may reduce vapor, but may not prevent ignition in closed spaces. (ERG, 2016)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: Wear positive pressure self-contained breathing apparatus (SCBA). Structural firefighters' protective clothing will only provide limited protection. (ERG, 2016)

The concn of 2,4,6-trimethylpyridine in Australian oil shale retort water (basic fraction) was 2 mg/l(1). The concn of 2,4,6-trimethylpyridine in condensate and process retort water produced in modified in situ oil-shale retort were 70.1 and 4.0 mg/l, respectively(2). In a closed system, 2,4,6-trimethylpyridine was detected in air above 1 of 3 samples of shale oil wastewaters (detection limit of 0.4 ng per 1 ml air)(3); a concn of 8.3 ng of 2,4,6-trimethylpyridine per 1 ml of air was measured above a 1 ml sample of wastewater with a concn of <0.8 ng/ml of 2,4,6-trimethylpyridine(3).

LD50 Rat oral 400 mg/kg|LD50 Guinea pig skin 1 g/kg

2,4,6-Trimethylpyridine is found in small amounts in coal tar and shale oil(1).

2,4,6-Trimethylpyridine's production and use as a chemical intermediate and as a dehydrohalogenation agent(1) may result in its release to the environment through various waste streams(SRC).

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 250(SRC), determined from a log Kow of 1.9(2) and a regression-derived equation(3), indicates that 2,4,6-trimethylpyridine is expected to have moderate mobility in soil(SRC). The pKa of 2,4,6-trimethylpyridine is 7.4(4), indicating that this compound will mainly exist in the protonated form in the environment and cations generally adsorb to organic carbon and clay more strongly than their neutral counterparts, thus attenuating soil mobility(5). Volatilization of 2,4,6-trimethylpyridine from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 8.8X10-6 atm-cu m/mole(SRC), derived from its vapor pressure, 2.0 mm Hg(6), and water solubility, 3.5X10+4 mg/l(7). However, adsorption to soil is expected to attenuate volatilization(SRC). The potential for volatilization of 2,4,6-trimethylpyridine from dry soil surfaces may exist(SRC) based upon a vapor pressure of 2.0 mm Hg(6). Under aerobic and anaerobic conditions, 2,4,6-trimethylpyridine, present at 1 mM, degraded 100% in >97 days at pH 7 using a 0.5% garden soil suspension with glucose-yeast extract (20 ppm) and a screening test(8). Within 2 weeks under aerobic conditions, 100% transformation of 2,4,6-trimethylpyridine occurred in soil previously contaminated with pyridine contaminants(9).|AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 250(SRC), determined from a log Kow of 1.9(2) and a regression-derived equation(3), indicates that 2,4,6-trimethylpyridine is expected to adsorb slightly to suspended solids and sediment(SRC). However, the pKa of 2,4,6-trimethylpyridine is 7.4(4), indicating that this compound will mainly exist in the protonated form in the environment and cations generally adsorb to organic carbon and clay more strongly than their neutral counterparts(5). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 8.8X10-6 atm-cu m/mole(SRC), derived from its vapor pressure, 2.0 mm Hg(6), and water solubility, 3.5x10+4 mg/l(7). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 3.1 and 38 days, respectively(SRC). According to a classification scheme(8), an estimated BCF of 6(SRC), from its log Kow(2) and a regression-derived equation(9), suggests the potential for bioconcentration in aquatic organisms is low(SRC). Under aerobic and anaerobic conditions, 2,4,6-trimethylpyridine, present at 1 mM, degraded 100% in >97 days at pH 7 using a 0.5% garden soil suspension with glucose-yeast extract (20 ppm) and a screening test(10).|ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), 2,4,6-trimethylpyridine, which has a vapor pressure of 2.0 mm Hg at 25 °C(2), is expected to exist solely as a vapor in the ambient atmosphere(SRC). Vapor-phase 2,4,6-trimethylpyridine is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be 2.3 days(SRC), calculated from its rate constant of 7.0X10-12 cu cm/molecule-sec at 25 °C(SRC) that was derived using a structure estimation method(3).

The rate constant for the vapor-phase reaction of 2,4,6-trimethylpyridine with photochemically-produced hydroxyl radicals has been estimated as 7.0X10-12 cu cm/molecule-sec at 25 °C(SRC) using a structure estimation method(1). This corresponds to an atmospheric half-life of about 2.3 hrs at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm(1). 2,4,6-Trimethylpyridine is not expected to undergo hydrolysis in the environment due to the lack of hydrolyzable functional groups(2). 3,5-Lutidine, a structurally similar alkylated pyridine, has a weak absorption band that extends into the environmental UV spectrum(3), which suggests that direct photolysis is not likely to be an important fate process for alkylated pyridines(SRC).

An estimated BCF of 6 was calculated for 2,4,6-trimethylpyridine(SRC), using a log Kow of 1.9(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC).

The Koc of 2,4,6-trimethylpyridine is estimated as 250(SRC), using a log Kow of 1.9(1) and a regression-derived equation(2). According to a classification scheme(3), this estimated Koc value suggests that 2,4,6-collidine is expected to have moderate mobility in soil(SRC). The pKa of 2,4,6-trimethylpyridine is 7.4(4), indicating that this compound will partially exist in the protonated form in the environment and cations generally adsorb to organic carbon and clay more strongly than their neutral counterparts(5).

The Henry's Law constant for 2,4,6-trimethylpyridine is estimated as 8.8X10-6 atm-cu m/mole(SRC) derived from its vapor pressure, 2 mm Hg(1), and water solubility, 3.5X10+4 mg/l(2). This Henry's Law constant indicates that 2,4,6-trimethylpyridine is expected to volatilize from water surfaces(3). Based on this Henry's Law constant, the volatilization half-life from a model river (1 m deep, flowing 1 m/sec, wind velocity of 3 m/sec)(3) is estimated as 3.1 days(SRC). The volatilization half-life from a model lake (1 m deep, flowing 0.05 m/sec, wind velocity of 0.5 m/sec)(3) is estimated as 38 days(SRC). 2,4,6-Trimethylpyridine's estimated Henry's Law constant indicates that volatilization from moist soil surfaces may occur(SRC). However, the pKa of 2,4,6-trimethylpyridine is 7.4(4) which suggests that volatilization from water surfaces is expected to be attenuated slightly since ions are not expected to volatilize(SRC). 2,4,6-Trimethylpyridine is expected to volatilize from dry soil surfaces(SRC) based upon its vapor pressure(1).

SURFACE WATER: The concentration of 2,4,6-trimethylpyridine ranged from 0 to 0.032 ug/l at 6 locations in the polluted Rhine River Delta, Germany between the years 1980-1990(1).|GROUNDWATER: 2,4,6-Trimethylpyridine was detected in groundwater from 1 of 10 wells at a coal and oil gasification plant (Gas Works Park, Seattle, WA) which has been in operation since 1956(1); the concentration of 2,4,6-trimethylpyridine was 0.16 mg/l(1).

NIOSH (NOES Survey 1981-1983) has statistically estimated that 712 workers (593 of these are female) are potentially exposed to 2,4,6-trimethylpyridine in the US(1). Occupational exposure to 2,4,6-trimethylpyridinee may occur by dermal contact with this compound at workplaces where 2,4,6-trimethylpyridine is produced or used(SRC).

PYRIDINE & ITS ALKYL DERIV ARE ABSORBED FROM GI TRACT, IP CAVITY, & LUNGS. /PYRIDINE & ITS ALKYL DERIV/

METABOLIC FATE OF PYRIDINES IS NOT COMPLETELY KNOWN. HYDROXYLATION, N-METHYLATION, OXIDN & CONJUGATION REACTIONS HAVE BEEN IDENTIFIED. /PYRIDINES/

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution. (ERG, 2016)

Excerpt from ERG Guide 128 [Flammable Liquids (Water-Immiscible)]: Ensure that medical personnel are aware of the material(s) involved and take precautions to protect themselves. Move victim to fresh air. Call 911 or emergency medical service. Give artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult. Remove and isolate contaminated clothing and shoes. In case of contact with substance, immediately flush skin or eyes with running water for at least 20 minutes. Wash skin with soap and water. In case of burns, immediately cool affected skin for as long as possible with cold water. Do not remove clothing if adhering to skin. Keep victim calm and warm. (ERG, 2016)

/SRP:/ Basic treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 ml/kg up to 200 ml of water for dilution if the patent can swallow, has a strong gag reflex, and does not drool. Administer activated charcoal ... . /Aniline and related compounds/|/SRP:/ Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious. Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV with D5W /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. Administer 1% solution methylene blue if patient is symptomatic with severe hypoxia, cyanosis, and cardiac compromise not responding to oxygen. ... . For hypotension with signs of hypovolemia, administer fluid cautiously. Consider vasopressors if hypotensive with a normal fluid volume. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Aniline and related compounds/

MAJOR ACTIONS OF PYRIDINE & ITS SIMPLE ALKYL DERIV ARE...NERVOUS SYSTEM DEPRESSION... /PYRIDINE & ITS ALKYL DERIV/|...PYRIDINE AND ITS DERIV CAUSE LOCAL IRRITATION ON CONTACT WITH SKIN, MUCOUS MEMBRANES AND CORNEA. /PYRIDINE & DERIVATIVES/|TRANSIENT SYMPTOMS OF NAUSEA, HEADACHE, INSOMNIA, NERVOUSNESS, & LOW BACK OR ABDOMINAL DISCOMFORT WITH URINARY FREQUENCY HAVE BEEN OBSERVED IN PERSONS WITH REPEATED EXPOSURES TO PYRIDINE IN CONCN VARYING FROM 15-330 PPM. /PYRIDINE/|...EXPOSURE TO...MIXT OF PYRIDINE, PICOLINE, LUTIDINE, & COLLIDINE...IN 2 MEN. BOTH HAD GI DISTURBANCES, & 1 HAD...LOSSES OF CONSCIOUSNESS...FACIAL PARALYSIS, ANISOCORIA, & ATAXIA. OTHER HAD HEADACHE... RIGHT-SIDE FACIAL PARALYSIS, & 2 DAYS LATER...PTOSIS...ANISOCORIA, & LEFT-SIDED ABDUCENS PARESIS.|...COLLIDINES, CAUSE SYMPTOMS RESEMBLING THOSE OBSERVED WITH PYRIDINE. THESE ARE LARGELY, NONSPECIFIC & INCL WEAKNESS, ATAXIA, DIARRHEA, & UNCONSCIOUSNESS. DELAYED DEATHS FOLLOWING SINGLE DOSE ARE UNCOMMON & SURVIVORS GENERALLY GAIN WT NORMALLY. /COLLIDINES/

2,4,6-trimethylpyridine

Grades: Technical (97.5% purity)

Pyridine, 2,4,6-trimethyl-: ACTIVE

SPECTROPHOTOMETRIC DETERMINATION OF TOTAL PYRIDINE BASES IN AIR OF COKE PLANT.|A method for air analysis involves adsorption on charcoal, desorption with methylene chloride, followed by gas chromatographic analysis.

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